CN203351241U - High frequency current transmission cable for induction heating equipment - Google Patents
High frequency current transmission cable for induction heating equipment Download PDFInfo
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- CN203351241U CN203351241U CN 201320436319 CN201320436319U CN203351241U CN 203351241 U CN203351241 U CN 203351241U CN 201320436319 CN201320436319 CN 201320436319 CN 201320436319 U CN201320436319 U CN 201320436319U CN 203351241 U CN203351241 U CN 203351241U
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- induction heating
- frequency current
- current transmission
- cable
- heating equipment
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Abstract
The utility model relates to a cable, and specially relates to a high frequency current transmission cable for induction heating equipment. The high frequency current transmission cable comprises an insulation sheath and a lead clad in the sheath, the lead comprises a plurality of wire cores intertwisted together, the external surface of each wire core is provided with an insulating layer, and wire cores are in parallel connected through two ends of each wire core. The cable can replace a water cooling cable, a skin effect is effectively reduced, the utilization rate of the lead is increased, line loss is minimized, and the transmission efficiency of the power supply is raised.
Description
Technical field
The utility model relates to a kind of cable, is specifically related to a kind of induction heating equipment high-frequency current transmission cable.
Background technology
When prismatic electric conductor passes through direct current, the CURRENT DISTRIBUTION on cross-sectional area of conductor is that current density equates uniformly; But, when prismatic electric conductor passes through the high-frequency alternating electric current, inhomogeneous state will appear in the CURRENT DISTRIBUTION on cross-sectional area of conductor, electric current is only in conductor subsurface runoff mistake, the current density maximum on top layer, conductor deep layer current density is less, and the performance that becomes of this high-frequency alternating electric current resembles the kelvin effect that is called as electric current.Due to restrictions such as production technology, Workplaces, high-frequency high-power induction heating power and heater can be positioned in two distant diverse locations, adopt water-cooled cable to be connected between the two, with the carry high frequency electric current.Due to the existence of kelvin effect, adopt water-cooled cable can have two problems: one, most of high-frequency electrical fails to be convened for lack of a quorum and flows through from the surface of cable, and the cable practical efficiency is low; Its two, water-cooled cable line loss is larger, the power supply transmission efficiency is low.In addition, water-cooled cable must be equipped with water circulation system, has so just increased cost and fault point.
Summary of the invention
The purpose of this utility model is to provide a kind of cable utilance induction heating equipment high-frequency current transmission cable high, that loss is low.
In order to reach above purpose, the technical scheme that the utility model adopts is: a kind of induction heating equipment described in the utility model comprises insulation sheath and is wrapped in the wire in insulation sheath with the high-frequency current transmission cable, described wire comprises many heart yearns twisted together, the outer surface of described heart yearn is provided with insulating barrier, the two ends parallel connection of heart yearn.
Described heart yearn comprises many monofilament twisted together.
The outer surface of described monofilament is provided with insulating barrier, the two ends parallel connection of monofilament.
The direction of lay of described heart yearn is identical with the direction of lay of monofilament.
The direction of lay of described heart yearn is contrary with the direction of lay of monofilament.
The beneficial effects of the utility model are: replace water-cooled cable, can effectively reduce kelvin effect, increase the utilance of wire, can reduce line loss, improve power delivery efficiency simultaneously.
The accompanying drawing explanation
Fig. 1 is the cross-sectional view of an embodiment of the utility model.
Fig. 2 is the cross-sectional view of another embodiment of the utility model.
Embodiment
A kind of induction heating equipment described in the utility model comprises insulation sheath 1 and is wrapped in the wire in insulation sheath 1 with the high-frequency current transmission cable, as shown in Figure 1, described wire comprises many heart yearns twisted together 3, and many heart yearns 3 are twisted together in the shape of a spiral.Described heart yearn 3 adopts the round conductor of single cylindrical-shaped structure, and its outer surface is provided with insulating barrier, and the two ends of many heart yearns 3 are connected in parallel, and forms the current delivery cable that connects induction heater and induction heating power.
As shown in Figure 2, described heart yearn 3 comprises many monofilament twisted together 4, and the outer surface of monofilament 4 is provided with insulating barrier, the two ends parallel connection of monofilament 4.Multifilament 4 is twisted together has in the shape of a spiral formed heart yearn 3.The direction of lay of heart yearn 3 is identical or contrary with the direction of lay of monofilament 4.
When the high-frequency alternating electric current passes through conductor, due to the impact of kelvin effect, electric current only passes through on the conductor top layer, and the degree of depth of superficial layer is relevant with the height of the character of conductor and power frequency, and the degree of depth of this superficial layer is referred to as to penetration depth.For the round conductor of certain diameter, the square root of penetration depth and frequency is inversely proportional to, and along with the increase of frequency, penetration depth reduces.Penetration depth illustrates that the utilance of wire is higher more deeply, otherwise utilance is low.
For the round conductor of certain diameter, because making the net sectional area of wire, kelvin effect reduces, and AC resistance increases, therefore diameter of wire is larger, the A.C.power loss caused because of AC resistance is larger.If adopt sub-thread major diameter wire to be connected with heater as induction heating power, can cause line loss to increase, the power delivery Efficiency Decreasing.
In view of above-mentioned analysis, we adopt the cross section sum to equal many of single conductor than the thin wire parallel connection, and the multifibres strand cable replaces heavy in section single conductor cable.Evidence, adopt this cable to greatly reduce the fever phenomenon of circuit, reduced line loss, improved the service efficiency of cable.
Claims (5)
1. an induction heating equipment high-frequency current transmission cable, comprise insulation sheath (1) and be wrapped in the wire in insulation sheath (1), it is characterized in that: described wire comprises many heart yearns twisted together (3), the outer surface of described heart yearn (3) is provided with insulating barrier, the two ends parallel connection of heart yearn (3).
2. a kind of induction heating equipment high-frequency current transmission cable according to claim 1, it is characterized in that: described heart yearn (3) comprises many monofilament twisted together (4).
3. a kind of induction heating equipment high-frequency current transmission cable according to claim 2, it is characterized in that: the outer surface of described monofilament (4) is provided with insulating barrier, the two ends parallel connection of monofilament (4).
4. a kind of induction heating equipment high-frequency current transmission cable according to claim 2, it is characterized in that: the direction of lay of described heart yearn (3) is identical with the direction of lay of monofilament (4).
5. a kind of induction heating equipment high-frequency current transmission cable according to claim 2, it is characterized in that: the direction of lay of described heart yearn (3) is contrary with the direction of lay of monofilament (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320436319 CN203351241U (en) | 2013-07-22 | 2013-07-22 | High frequency current transmission cable for induction heating equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320436319 CN203351241U (en) | 2013-07-22 | 2013-07-22 | High frequency current transmission cable for induction heating equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203351241U true CN203351241U (en) | 2013-12-18 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320436319 Expired - Fee Related CN203351241U (en) | 2013-07-22 | 2013-07-22 | High frequency current transmission cable for induction heating equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203351241U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105448389A (en) * | 2015-12-31 | 2016-03-30 | 中国人民解放军国防科学技术大学 | Low-impedance high-voltage coaxial cable |
-
2013
- 2013-07-22 CN CN 201320436319 patent/CN203351241U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105448389A (en) * | 2015-12-31 | 2016-03-30 | 中国人民解放军国防科学技术大学 | Low-impedance high-voltage coaxial cable |
| CN105448389B (en) * | 2015-12-31 | 2017-02-01 | 中国人民解放军国防科学技术大学 | Low-impedance high-voltage coaxial cable |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20131218 Termination date: 20160722 |